Page 77 - DCAP101_BASIC_COMPUTER_SKILLS

Basic Computer Skills

Notes 4. LED indicator stands for ………………

(a) Light-emitting diode (b) Level-emitting diode
(c) Low-emitting diode (d) None of these
5. A …………….. is a pointing device similar to a roller-ball mouse.

(a) Electronic pen (b) Trackball
(c) All of above (d) None of these

6. A color inkjet printer comes with two ink cartridges-black and ……..
(a) Tricolor (b) Blue, green, white (c) None of these
7. A4 size is equal to 8" × 12" page.

(a) True (b) False
8. CRT stands for …………..
(a) Crystal ray tube (b) Cathode ray tube

9. The UPC bar code patterns are decoded as ……….digit.
(a) 5 (b) 10
(c) 12 (d) 2

4.8 Review Questions

1. What is a secondary storage? How does it differ from a primary storage?

2. What are the main limitations of primary storage of a computer system?
3. Why I/O devices are necessary for a computer system?
4. What are peripheral devices? Why are they called so?

5. Why I/O devices are very slow as compared to the speed of primary storage and CPU?

6. What is an input device? Name some commonly used input devices.
7. What are keyboard devices?
8. What are point-and-draw devices? Name some commonly used point-and-draw devices.

9. Explain how information is recorded on a magnetic tape.

10. Why is the secondary storage used in most computer \stems?
11. Name some popular secondary storage devices used in today’s computer systems.
12. What is a sequential-access storage device? Write examples of a few applications for
which such a storage device is suitable.
13. What is a random-access storage device‘? Write examples of a few applications for
which such a storage device is suitable.
14. Distinguish between a sequential access, a direct access, and a random access storage
device. Write one example of each.
15. What factors determine storage capacity of disks?

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